Of Cw Phase Delay Patents (Class 356/5.1)
  • Patent number: 11478156
    Abstract: An illumination source may be configured to illuminate the skin of the user. An illumination detector may detect electromagnetic radiation reflected of the skin of the user. A compensation module may be configured to determine the position of the skin of the user relative to the illumination detector. A processor may be configured to determine a heart rate of the user by analyzing information corresponding to an amount of the electromagnetic radiation detected by the illumination detector. The processor may also determine the heart rate of the user by compensating for the position of the skin of the user as determined by the compensation module.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: October 25, 2022
    Assignee: NIKE, Inc.
    Inventor: Steven H. Walker
  • Patent number: 11460293
    Abstract: An electronic device is described. The electronic device includes a housing, a set of one or more SMI sensors attached to the housing, and a processor. The set of one or more SMI sensors includes a set of one or more electromagnetic radiation emitters having a set of one or more resonant cavities and configured to emit a set of one or more beams of electromagnetic radiation. The set of one or more SMI sensors also includes a set of one or more detectors configured to generate indications of self-mixing within the set of one or more resonant cavities. The processor is configured to characterize, using the indications of self-mixing, an optical field speckle of a target. The processor is also configured to characterize, using the characterization of the optical field speckle, a surface quality of the target.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: October 4, 2022
    Assignee: Apple Inc.
    Inventors: Tong Chen, Ahmet Fatih Cihan, Mingzhou Jin
  • Patent number: 11448735
    Abstract: In one embodiment a LIDAR can comprise two similar photodetector arrays and a malfunction indicator circuit operable to generate a malfunction signal when a measure of difference between range data from similar directions reported by each of the photodetectors exceeds a threshold value. A challenge associated with LIDARs is malfunction detection and failsafe operation in the event of a malfunction. Embodiments provide for two photodetectors in a shared remote ranging subassembly to address the challenges of malfunction detection. The two photodetector arrays can each receive light reflections from overlapping angular ranges in one or more FOVs (e.g. transferred using CFOBs) and thereby function to provide redundancy and confirmation of reflection distances. Within embodiments a reflection splitter can serve to uniformly distribute laser reflections from a common field of view among two photodetectors, thereby providing each with a half-resolution image for range comparison.
    Type: Grant
    Filed: December 23, 2017
    Date of Patent: September 20, 2022
    Inventor: James Thomas O'Keeffe
  • Patent number: 11422240
    Abstract: A light detector is provided to include a light receiving array having a plurality of light receivers respectively outputting pulse signals upon incidence of photons. A delay setting value is set which is used to adjust a time interval from when the pulse signals are output from the light receiving array to when a response number, which is a specified number of the light receivers outputting the pulse signals, is acquired.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: August 23, 2022
    Assignee: DENSO CORPORATION
    Inventors: Kenta Azuma, Noriyuki Ozaki, Shinji Kashiwada, Teiyu Kimura, Isamu Takai, Hiroyuki Matsubara
  • Patent number: 11385336
    Abstract: A time of flight sensor includes a time of flight (TOF) processor having a digital TOF port, a digital input port, and a digital output port, the TOF processor comprising a phase detector including cyclically rotating demultiplexer (DEMUX), a first summer coupled to a first DEMUX output, a second summer coupled to a second DEMUX output, a third summer coupled to a third DEMUX output, a fourth summer coupled to a fourth DEMUX output, and a phase estimator coupled to outputs of the first summer, the second summer, the third summer and the fourth summer and having a phase estimate output; a driver having a digital driver port coupled to the digital TOF port and a driver output port; and an analog-to-digital converter (ADC) having an output port coupled to the digital input port of the digital TOF processor.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: July 12, 2022
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Arvin Emadi, Charles J. Razzell, John P. Hanks
  • Patent number: 11287517
    Abstract: A Time of Flight (ToF) system, includes one or more optical elements configured to emit optical signals at two or more measurement frequencies and at least one disambiguation frequency, a detector array comprising a plurality of detectors that are configured to output respective detection signals responsive to light provided thereto, and a circuit configured to control the detector array to obtain a first subset of the detection signals at a first plurality of phase offsets corresponding to the two or more measurement frequencies and to obtain a second subset of the detection signals at a second plurality of phase offsets corresponding to the at least one disambiguation frequency, wherein the second plurality comprises fewer phase offsets than the first plurality.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: March 29, 2022
    Inventors: Dietrich Dehlinger, Hod Finkelstein
  • Patent number: 11172186
    Abstract: The invention relates to a TOF camera system comprising several cameras, at least one of the cameras being a TOF camera, wherein the cameras are assembled on a common substrate and are imaging the same scene simultaneously and wherein at least two cameras are driven by different driving parameters.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: November 9, 2021
    Assignee: Sony Depthsensing Solutions SA/NV
    Inventors: Daniel Van Nieuwenhove, Julien Thollot
  • Patent number: 11143552
    Abstract: The disclosure provides a circuit to mitigate ripple. The circuit includes a controller that generates a PWM (pulse width modulated) clock signal. A DC/DC converter receives the PWM clock signal, and generates an output signal. A light source is coupled to the DC/DC converter, and receives the output signal. The light source transmits light pulses during an integration time. A time integral of the output signal during the integration time is constant during a plurality of quad time periods.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: October 12, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Subhash Chandra Venkata Sadhu, Bharath Patil
  • Patent number: 10976747
    Abstract: A method is provided for generating a representation of an environment. Methods may include: determining location information of a vehicle including a road segment and a direction of travel; identifying features of the road segment based on sensor data from sensors carried by the vehicle; projecting the features of the road segment onto a ground plane of the road segment; defining bins across a width of the road segment; laterally positioning the defined bins relative to a determination of positions of the features of the road segment; consolidating detected features of each bin to define features of the road segment; and guiding an autonomous vehicle along the road segment based, at least in part, on the consolidated detected features of the road segment.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: April 13, 2021
    Assignee: HERE GLOBAL B.V.
    Inventors: Anirudh Viswanathan, Matt Mott
  • Patent number: 10969492
    Abstract: The aim of the invention is to provide an architecture of a laser imager having high spatial resolution, compatible with an application installed on board a vehicle, in particular on board an aircraft. For this purpose, the invention proposes the generation of a piece of wide-field laser ranging information by a suitable remote optical system. An example of a piece of equipment (1) according to the invention installed on board an aircraft moving in an environment that is likely to contain obstacles (4), in particular an aircraft on the ground, includes a laser range finder (11) coupled to an optical fibre (F1) emitting laser pulses (I), which is itself coupled to an optical system providing an interface with the environment (12) via an optical cross-connect (13) coupled to a covered optical fibre bundle, in the form of laser illuminations (Fi).
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: April 6, 2021
    Assignees: Latecoere, Office National d'Etudes et Recherches Aerospatiales
    Inventors: Gerard Boucourt, Nicolas Riviere
  • Patent number: 10876966
    Abstract: The present disclosure includes systems and methods for calibration of an optical sensor package, including setting an initial detection threshold of a detector, gradually increasing a power level of a signal generator that is in communication with a detector to cause a detected power at the detector to exceed the initial detection threshold, storing in a memory a first power level of the signal generator at which the detected power at the detector exceeds the initial detection threshold, and adjusting the initial detection threshold of the detector to an adjusted detection threshold to include a detection buffer amount within the adjusted detection threshold.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: December 29, 2020
    Assignee: TT ELECTRONICS PLC
    Inventor: Troy Don Cook
  • Patent number: 10782515
    Abstract: A microscope system includes: a stage on which an observation sample is mounted; an objective lens; a driving unit configured to drive the stage or the objective lens to change a distance between the stage and the objective lens; a light source configured to selectively irradiate the observation sample with one of autofocus detection light and excitation light; an irradiation region changing unit configured to change a region in which the observation sample is irradiated with light; a first mirror unit; a second mirror unit; a mirror arrangement unit configured to selectively arrange one of the first mirror unit and the second mirror unit on the optical axis; an imaging unit configured to capture the observation sample; a light intensity calculating unit configured to calculate light intensity; and a controller configured to adjust, based on a reference position, a distance between the observation subject and the objective lens.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: September 22, 2020
    Assignee: OLYMPUS CORPORATION
    Inventor: Takehiko Hayashi
  • Patent number: 10701913
    Abstract: The present disclosure describes a system and method for the use of unmanned aircraft systems to detect, locate, and identify objects in, on, or near the water that may provide useful information to people in a different location, such as on a nearby vessel for purposes of ultimately locating fish. The vessel can then take action based on data collected by the unmanned aircraft system, such as move to a new location to catch fish as detected by the unmanned aircraft system.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: July 7, 2020
    Assignee: PLANCK AEROSYSTEMS INC.
    Inventors: David Twining, Joshua Wells
  • Patent number: 10502808
    Abstract: A distance measuring device according to an embodiment includes a first device including a first transceiver configured to transmit a first known signal and a second known signal and receive a third known signal corresponding to the first known signal and a fourth known signal corresponding to the second known signal, a second device including a second transceiver configured to transmit the third known signal and the fourth known signal and receive the first and second known signals and a calculating section configured to calculate a distance between the first device and the second device on a basis of phases of the first to fourth known signals, and the first transceiver and the second transceiver transmit/receive the first and third known signals one time each and transmit/receive the second and fourth known signals one time each, performing transmission/reception a total of four times.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: December 10, 2019
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Masaki Nishikawa
  • Patent number: 10401865
    Abstract: A light detection and ranging (LIDAR) device scans through a scanning zone while emitting light pulses and receives reflected signals corresponding to the light pulses. The LIDAR device scans the emitted light pulses through the scanning zone by reflecting the light pulses from an array of oscillating mirrors. The mirrors are operated by a set of electromagnets arranged to apply torque on the mirrors, and an orientation feedback system senses the orientations of the mirrors. Driving parameters for each mirror are determined based on information from the orientation feedback system. The driving parameters can be used to drive the mirrors in phase at an operating frequency despite variations in moments of inertia and resonant frequencies among the mirrors.
    Type: Grant
    Filed: March 10, 2019
    Date of Patent: September 3, 2019
    Assignee: Waymo LLC
    Inventors: Drew Ulrich, Pierre-yves Droz, Samuel Lenius
  • Patent number: 10310084
    Abstract: A range imaging apparatus includes a light illuminator that emits signal light from a light source toward a subject; a light receiver that receives light reflecting off the subject; a range image generator that calculates a distance value to the subject based on a time difference between emission and light reception, and generates a range image; a distance value distribution analyzer that calculates a distribution characteristic of the distance value calculated by the range image generator; an illumination controller that adjusts output of the light illuminator; an exposure controller that adjusts exposure by the light receiver; and a signal adjuster that adjusts the illumination controller and the exposure controller based on the distribution characteristic. The signal adjuster adjusts at least one of the illumination controller and the exposure controller for the second signal light based on the distribution characteristic obtained through emission and light reception of the first signal light.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: June 4, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yoshihiko Murai, Shinji Yamamoto
  • Patent number: 10274589
    Abstract: In order to improve the failure proneness of methods or devices for optically measuring distances, it is proposed that the measurement pulses for measuring distances are sent out aperiodically.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: April 30, 2019
    Assignee: Ibeo Automotive Systems GmbH
    Inventors: Michael Kiehn, Michael Köhler, Olaf Schubert, Hans-Martin Kroll
  • Patent number: 10145940
    Abstract: A system and method for a rangefinding instrument incorporating pulse and continuous wave signal generating and processing techniques for increased distance measurement accuracy. The use of the former technique effectively solves the ambiguity issues inherent in the latter while allowing for relatively simple circuit implementations. Thus, a potentially more accurate phase-based distance measurement technique can be utilized which is also completely independent of the maximum range to the target.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: December 4, 2018
    Assignees: LASER TECHNOLOGY, INC., KAMA-TECH (HK) LIMITED
    Inventors: Jeremy G. Dunne, Mark Frischman
  • Patent number: 10134304
    Abstract: Various arrangements for avoiding obstacles for a visually-impaired pedestrian are presented. An m by n matrix of distance measurements may be created using a scanning time of flight (ToF) sensor component for various different directions. The m by n matrix of distance measurements and the m by n direction matrix may be analyzed to identify a first obstacle having a vertical height that differs by at least a predefined threshold measurement from a neighboring second region. Based on identifying the first obstacle, an indication of the first obstacle and an indication of the distance to the first obstacle determined using the m by n matrix of distance indications may be output.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: November 20, 2018
    Assignee: DISH Technologies L.L.C.
    Inventors: William Michael Beals, Jeffrey Lang McSchooler
  • Patent number: 10126118
    Abstract: A distance measuring system includes a light emitting member, an optical member, an image sensing member, and a computing member. The light emitting member provides a light beam to an object. The optical member is disposed on a transmission path of the light beam reflected by the object. The image sensing member is disposed on a transmission path of the part of the light beam passing through the optical member, and the image sensing member has an image sensing area for receiving the part of the light beam passing through the optical member and receiving the part of the light beam not passing through the optical member. The computing member compares a difference between the deformation area and the non-deformation area of the object image so as to obtain a distance variation of the object.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: November 13, 2018
    Assignee: PIXART IMAGING INC.
    Inventor: Shu-Sian Yang
  • Patent number: 9983298
    Abstract: Laser rangefinders and methods of using laser rangefinders are disclosed. One embodiment of a laser rangefinder includes a first DDS (direct digital synthesizer) outputting a first reference signal, an isolated laser source that receives the first signal and outputs an optical signal, a collimating lens coupled to the isolated laser source adapted to direct the optical signal to free space, a collecting lens positioned adjacent to the collimating lens adapted to receive a modulated optical signal from free space, a pin diode detector coupled to collecting lens, a second DDS outputting a second reference signal, and a computing device adapted to receive the first reference signal, the second reference signal, and the received modulated optical signal and calculate a distance.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: May 29, 2018
    Assignee: Associated Universities, LLC
    Inventor: Steven White
  • Patent number: 9971025
    Abstract: In a method of determining the distance of an object (10), a polarization-modulated transmission light beam (LS) is reflected at the object (10) and is received as a reception light beam (LE) by a polarization analyzer, and the output signal thereof is fed to an evaluation unit (A) for determining the distance. The polarization-modulated transmission light beam (LS) is generated by at least two light sources (D1, D2, D3) which emit differently polarized light beams (L1, L2, L3), wherein the light sources (D1, D2, D3) are each respectively operated with a distinct defined mark-space pattern (M1, M2, M3, M4, M5, M6). The polarization analyzer has polarization filters (P1, P2, P3) corresponding at least to the number of light sources. The respective polarization plane of each one of the polarization filters is correspondingly adapted to a respective polarization plane (E1, E2, E3) of the light beams (L1, L2, L3).
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: May 15, 2018
    Assignee: Conti Temic microelectronic GmbH
    Inventor: Guenter Anton Fendt
  • Patent number: 9921312
    Abstract: In a ranging system using a TOF method, an unwanted reflected light component included in reflected light is reduced or removed. A light source unit emits light at the timing indicated by a light emission control signal and can adjust for each of at least two irradiation regions the amount of light to be emitted. A light receiving unit is exposed to light from a region including a target object and produces three-dimensional information from the total exposure amount. An image processing unit generates a distance image based on the three-dimensional information received from the light receiving unit. The light source unit emits light according to a radiation pattern indicated by a region light amount signal. The radiation pattern is setting of the amount of light to be emitted to each irradiation region.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: March 20, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Haruka Takano
  • Patent number: 9823352
    Abstract: A time-of-flight (TOF) sensor device is provided with features for correcting distance measurement offset errors caused by such factors as temperature, dynamic reflectivity ranges of objects in the viewing space, or other factors. In various embodiments, the TOF sensor device generates corrected distance values based on comparison of two different distance values measured for an object by two different measurement techniques, including but not limited to phase shift measurement, pulsed TOF measurement, distance measurement based on the focal length of the TOF sensor's lens, and comparison of distance variations with light intensity variations. In addition, some embodiments of the TOF sensor device perform self-calibration using internal waveguides or parasitic reflections as distance references.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: November 21, 2017
    Assignee: Rockwell Automation Safety AG
    Inventors: Carl Meinherz, Martin Hardegger, Manfred Stein, Danilo Dorizzi
  • Patent number: 9606235
    Abstract: A laser metrology system may include a modulated measurement beam, a beam splitter for splitting the measurement beam into a local oscillator beam and a transmitted beam, an optical assembly for projecting the transmitted beam to a measured area on a surface of a target structure and for receiving a reflected beam from the measured area, a beam combiner for combining the reflected beam and the local oscillator beam into a detection beam, a detector for processing the detection beam, the detector including a micro-lens for projecting the detection beam, a photodetector for carrying out coherent detection of the detection beam and detector electronics in communication with the photodetector for generating informational data from the detection beam, and a range processor for computing dimensional data about the measured area from the informational data.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: March 28, 2017
    Assignee: The Boeing Company
    Inventors: Jonathan M. Saint Clair, Mitchell D. Voth, William D. Sherman, David C. Soreide
  • Patent number: 9453728
    Abstract: A measuring system for determining a distance between a sensor device and a measured object, wherein the sensor device comprises a light source for generating an illumination light beam and a detector for detecting a portion of the illumination light beam reflected on the surface of the measured object and wherein the measured object is designed so it is transparent at least for a wavelength range of the visible light, is designed and further developed under consideration of the most reliable distance measurement possible in all types of measuring situations, that the illumination light beam has a wavelength in the violet or ultraviolet range and that the measured object is designed in such a way that the illumination light beam is diffusely reflected on the surface of the measured object. In addition, a corresponding measuring system is specified for measuring measured objects that are essentially impermeable to light.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: September 27, 2016
    Assignee: MICRO-EPSILON Optronic GmbH
    Inventor: Torsten Stautmeister
  • Patent number: 9329272
    Abstract: A method comprises obtaining first information, the first information including depth information with a first range of unambiguity. A first image processing is performed on the first information to generate first modified information. Furthermore, second information is obtained, the second information including depth information with a second range of unambiguity.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: May 3, 2016
    Assignee: Infineon Technologies AG
    Inventor: Gerwin Fleischmann
  • Patent number: 9313372
    Abstract: An image sensor is provided which includes a plurality of unit pixels, ones of which are configured to convert an input light signal into at least four frame signals. The image sensor also includes a signal processor that is configured to measure a distance from an object based on the at least four frame signals from one of the plurality of unit pixels.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: April 12, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Minseok Oh, Haekyung Kong, Han Soo Lee, Taechan Kim, Jungchak Ahn, Moosup Lim
  • Patent number: 9253471
    Abstract: A depth camera includes a sensor unit receiving a reflected light and in response thereto outputting an electrical sensing signal; and a synchronization information calculation unit calculating a performance index with reference to the sensing signal, and with reference to the performance index, generating synchronization information for synchronizing a demodulation clock for sensing the received reflected light. The sensor unit adjusts the frequency and/or phase of the demodulation clock with reference to the synchronization information.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: February 2, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kwanghyuk Bae, Kyu-Min Kyung, Tae-Chan Kim, Seunghee Lee
  • Patent number: 9193471
    Abstract: A system for detecting the status of a tube for fuel transfer. It includes a nozzle for a telescoping tube employed in air to air refueling and transfer of fuel on a tanker aircraft with a system that detects the status of the connection of the nozzle with respect of a receptacle in a receiving aircraft, the system detecting the characteristics of the status of the connection of the nozzle in the receptacle by direct measurement of parameters in the nozzle itself of the tanker aircraft.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: November 24, 2015
    Assignee: EADS Construcciones Aeronauticas, S.A.
    Inventors: Francisco Javier Fernandez Garcia, Santiago Flores Giraldo
  • Patent number: 9189858
    Abstract: A method is disclosed for determining coordinates of a target in relation to a surveying instrument wherein a first image is captured using a first camera in a first camera position and orientation, a target is selected by identifying at least one object point in the first image, and first image coordinates of the object point in the first image are measured. In at least one embodiment, a second image is captured using a second camera in a second camera position and orientation, the object point identified in the first image is identified in the second image, and second image coordinates of the object point in the second image are measured. Target coordinates of the target in relation to the rotation center of the surveying instrument are then determined based on the first camera position and orientation, the first image coordinates, the second camera position and orientation, the second image coordinates, and first and second camera calibration data.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: November 17, 2015
    Assignee: TRIMBLE AB
    Inventors: Set Svanholm, Michael Vogel, Christian Grässer
  • Patent number: 9188427
    Abstract: A projective optical metrology system including a first optical unit, which includes: an optical input that receives a first light signal; a number of optical paths; and a separator, which is optically interposed between the optical input and the optical paths and separates a number of components of the first light signal received by the optical input and couples each of the separate components to a corresponding optical path. The first optical unit also includes a light target, which emits a second light signal and is formed by a number of light elements, each light element being optically coupled to a corresponding optical path, so as to be illuminated, in use, by the component of the first light signal coupled to the corresponding optical path. The metrology system also includes a second optical unit, which generates the first light signal and receives the second light signal.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: November 17, 2015
    Assignee: Thales Alenia Space Italia S.p.A. Con Unico Socio
    Inventors: Fulvio Bresciani, Fabio Musso
  • Patent number: 9165368
    Abstract: A method and system analyzes data acquired by image systems to more rapidly identify objects of interest in the data. In one embodiment, z-depth data are segmented such that neighboring image pixels having similar z-depths are given a common label. Blobs, or groups of pixels with a same label, may be defined to correspond to different objects. Blobs preferably are modeled as primitives to more rapidly identify objects in the acquired image. In some embodiments, a modified connected component analysis is carried out where image pixels are pre-grouped into regions of different depth values preferably using a depth value histogram. The histogram is divided into regions and image cluster centers are determined. A depth group value image containing blobs is obtained, with each pixel being assigned to one of the depth groups.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: October 20, 2015
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Abbas Rafii, Salih Burak Gokturk
  • Patent number: 9154223
    Abstract: An improved technique for acoustic sensing involves, in one embodiment, launching into a medium, a plurality of groups of pulse-modulated electromagnetic-waves. The frequency of electromagnetic waves in a pulse within a group differs from the frequency of the electromagnetic waves in another pulse within the group. The energy scattered by the medium is detected and, in one embodiment, the beat signal may be used to determine a characteristic of the environment of the medium. For example, if the medium is a buried optical fiber into which light pulses have been launched in accordance with the invention, the presence of acoustic waves within the region of the buried fiber can be detected.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: October 6, 2015
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Andrew B. Lewis, Stuart Russell
  • Patent number: 9148219
    Abstract: An improved technique for acoustic sensing involves, in one embodiment, launching into a medium, a plurality of groups of pulse-modulated electromagnetic-waves. The frequency of electromagnetic waves in a pulse within a group differs from the frequency of the electromagnetic waves in another pulse within the group. The energy scattered by the medium is detected and, in one embodiment, may be used to determine a characteristic of the environment of the medium. For example, if the medium is a buried optical fiber into which light pulses have been launched in accordance with the invention, the presence of acoustic waves within the region of the buried fiber can be detected.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: September 29, 2015
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Justin Hayward, Andrew B. Lewis, Stuart Russell
  • Patent number: 9094606
    Abstract: Methods and devices for correcting for motion blur in range cameras without increasing acquisition speed or reducing the overall quality of the distance determinations, by identifying moving objects in a scene and determining the speed and direction of the objects.
    Type: Grant
    Filed: July 3, 2012
    Date of Patent: July 28, 2015
    Assignee: WaikatoLink Limited
    Inventors: Lee Vincent Streeter, Adrian Andrew Dorrington, Andrew Dean Payne
  • Patent number: 9086123
    Abstract: In the transmission of mechanical movements, a mechanical angular positioning device is provided, and applies to optical instruments to position an element like a mirror according to three predefined positions. The angular positioning device comprises a frame and two imbricated mechanical movement transmission assemblies. The first assembly comprises a first support in pivot connection with the frame according to a first axis, which is rotatable by a first motor via two connecting rods which generate two dead centers for the first support. The second mechanical assembly comprises a second support in pivot connection with the first support, according to a second axis, not parallel with first axis. This second support is rotatable by a second motor via two connecting rods which generate two dead centers for the second support. One of the dead centers of the first support can coincide with one of the dead centers of the second support.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: July 21, 2015
    Assignee: THALES
    Inventors: Stephane Vezain, Yannick Baudasse, Sebastien Guionie
  • Patent number: 9063549
    Abstract: A light detection and ranging (LIDAR) device that scans through a scanning zone while emitting light pulses and receives reflected signals corresponding to the light pulses is disclosed. The LIDAR device scans the scanning zone by directing light toward a rotating mirror to direct the light pulses through the scanning zone. The rotating mirror is driven by a conductive coil in the presence of a magnetic field. The conductive coil is coupled to the rotating mirror and arranged in a plane perpendicular to the axis of rotation of the mirror. The axis of rotation of the mirror is oriented substantially parallel to a reflective surface of the mirror and passes between the reflective surface and the conductive coil.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: June 23, 2015
    Assignee: Google Inc.
    Inventors: Gaetan Pennecot, Pierre-yves Droz, Zachary Morriss, William McCann
  • Patent number: 9052382
    Abstract: Embodiments of the present invention provide methods to produce a high performance, feature rich TOF system, phase-based or otherwise using small TOF pixels, single-ended or preferably differential, as well as TOF systems so designed. IC chip area required for pixels is reduced by intelligently off-loading or removing from within the pixel certain components and/or functionality. In some embodiments during a single TOF system capture period, analog values from each pixel are repeatedly sampled and converted to digital values, which are combined and manipulated on the sensor chip. Combining this plurality of values enables appropriately compact data from the sensor chip. Embodiments of the present invention implement a TOF system with high ambient light resilience, high dynamic range, low motion blur and dealiasing support, while advantageously reducing pixel area size relative to prior art TOF pixels.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: June 9, 2015
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Cyrus Bamji, Swati Mehta
  • Patent number: 9041916
    Abstract: A 3D image sensor includes a depth pixel that includes; a photo detector generating photo-charge, first and second floating diffusion regions, a first transfer transistor transferring photo-charge to the first floating diffusion region during a first transfer period in response to a first transfer gate signal, a second transfer transistor transferring photo-charge to the second floating diffusion region during a second transfer period in response to a second transfer gate signal, and an overflow transistor that discharges surplus photo-charge in response to a drive gate signal. Control logic unit controlling operation of the depth pixel includes a first logic element providing the first transfer gate signal, a second logic element providing the second transfer gate signal, and another logic element providing the drive gate signal to the overflow transistor when the first transfer period overlaps, at least in part, the second transfer period.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: May 26, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min Seok Oh, Hae Kyung Kong, Tae Chan Kim, Jung Chak Ahn, Moo Sup Lim
  • Patent number: 8988664
    Abstract: Disclosed is a distance measuring device configured to irradiate an object with light and receive reflected light therefrom to measure a distance from the object, including a light source device having at least one light-emitting part, a deflection part being provided rotatably around a predetermined axis line and having plural deflection faces configured to reflect light from the light source device toward the object, a reflection part being provided rotatably around the axis line and integrally with the deflection part and having plural reflection faces being provided to correspond to the plural deflection faces individually and reflecting a portion of light reflected from a corresponding deflection face and reflected from the object, and a light-receiving part having at least one light-receiving element configured to receive light reflected from the reflection part, wherein respective inclination angles of the plural deflection faces with respect to the axis line are mutually different.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: March 24, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Shuichi Suzuki, Mitsuru Nakajima, Kenichi Yoshimura
  • Patent number: 8988661
    Abstract: Phase-based TOF systems operate with reduced depth error due to motion blur, and/or spatial blur, and/or pixel offset by intelligently determining how best to combine pixel values, and how best to compensate for individual pixel offsets. Such determination(s) may be carried out on a per pixel basis, dynamically, in real-time during TOF operation, or on archived TOF data. Offsets for individual pixels may be dynamically calculated and subtracted from the values acquired by those pixels Individual pixel offsets may be calculated for example by combining data acquired by the same pixel at two acquisitions, 180° out of phase with respect to each other. Calculated offsets may be averaged, or on a per pixel basis, and if target object motion is detected, one or more offset calculations can be discarded rather than averaged to reduce motion blur. Offsets acquired a priori during a TOF system calibration procedure may be used.
    Type: Grant
    Filed: May 29, 2010
    Date of Patent: March 24, 2015
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Gage Hills, Travis Perry, Cyrus Bamji
  • Patent number: 8964169
    Abstract: The invention relates to the topographic technique field, and provides a ranging method and a system, wherein the ranging method comprises the following steps: modulating measured beam, by a modulated signal of which the frequency is continuously changed over time; emitting the modulated measured beam to a measured object; receiving the reflected measured beam and converting the beam into the measured signals; and comparing the frequency of the modulated signal generated when the measured beam is received with the frequency of the measured signals, thus determining the measured distance.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: February 24, 2015
    Assignee: Mileseey Technology, Inc.
    Inventors: Zhi Chou, Weiming Li, Hongfei Wang
  • Patent number: 8958056
    Abstract: A triangulation light sensor includes at least one light transmitter for transmitting a light signal into a detection zone, a light receiver having a plurality of receiver elements for receiving light from the detection zone reflected diffusely and/or specularly, and a reception optics arranged between the detection zone and the light receiver in the beam path, with the position of a light spot produced on the light receiver in a triangulation direction by the reflected light resulting in dependence on the distance of the object. The reception optics includes at least one multisegmented lens element having a plurality of lens segments with mutually spaced apart optical axes in the triangulation direction and at least one freeform lens element or one diffractive-optical element having a multisegmented lens element having a plurality of lens segments with optical axes spaced apart from one another in the triangulation direction.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: February 17, 2015
    Assignee: Sick AG
    Inventors: Friedhelm Wiethege, Gerhard Merettig
  • Patent number: 8958057
    Abstract: Separate reception/transmission apertures enhance pointing: reception is more efficient than transmission (kept smaller for MEMS steering). Apparatus aspects of the invention include lidar transmitters emitting laser beams, and scan mirrors (or assemblies) angularly adjustable to deflect the beams in orthogonal directions. In one aspect, afocal optics magnify deflection; a transmitter aperture transmits the beam; a lidar receiver doesn't share the transmitter aperture. In another aspect, auxiliary optics calibrate the deflection. A method aspect of the invention notices and responds to a remote source—using a similar local laser, adjustable scan mirror or assembly, afocal deflection magnifier, transmission aperture and separate receiver. Method steps include operating the receiver to notice and determine location of the remote source; and controlling the transmitter to direct laser light back toward that location.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: February 17, 2015
    Assignee: Arete Associates
    Inventors: David M. Kane, Jeff T. Daiker, James T. Murray
  • Patent number: 8928865
    Abstract: A detection apparatus and method for FMCW LIDAR employ signals whose frequencies are modified so that low-cost and low-speed photodetector arrays can be employed for range detection. The LIDAR includes a single mode swept frequency laser (SFL), whose optical frequency is varied with time, as a result of which, a target beam reflected back by the target is shifted in frequency from a reference beam by an amount that is proportional to the relative range z to the target. The reflected target beam is combined with the reference beam and detected by the photodetector array. The difference between the frequencies of the reflected target beam and the reference beam is reduced to a level that is within the bandwidth of the photodetector array by first modulating the target and/or reference beam.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: January 6, 2015
    Assignee: Telaris, Inc.
    Inventor: George Rakuljic
  • Patent number: 8922758
    Abstract: A method of establishing the location of a pair construction points for a stud in a building interior at a construction site and for determining the length of the stud needed to extend between the pair of construction points uses a robotic total station. The points are defined by x and y coordinates and anticipated z coordinates on upper and lower surfaces. The robotic total station establishes the points by directing a beam of laser light toward anticipated points and, through an iterative process, determining the actual location of the points on upper and lower surfaces that have the same x and y coordinates.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: December 30, 2014
    Assignee: Trimble Navigation Limited
    Inventors: Robert Michael Miller, James M. McCartney
  • Patent number: 8922759
    Abstract: The invention describes an electronic travel aid (ETA) for blind and visually impaired persons implemented in a detachable handle of a white cane. The device enhances the functionality of the white cane giving the user more detailed information about the environment within a defined corridor of interest in front of the user with an extended range of a few meters up to 10 m. It provides a reliable warning if there is a risk of collision with obstacles including those at trunk or head height, which are not recognized by a conventional white cane. Additional sensors are integrated to delimit the defined corridor during the cane sweeping thereby reducing the amount of information that is transmitted to the user via the tactile interface. Alternatively, the device can be used independently from the cane as an object recognition and orientation aid.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: December 30, 2014
    Assignee: MESA Imaging AG
    Inventors: Roger Gassert, Yeongmi Kim, Thierry Oggier, Markus Riesch, Mathias Deschler, Cornelia Prott, Stefan Beat Schneller, Vincent Hayward
  • Patent number: 8908157
    Abstract: A measuring device for optically measuring a distance to a target object includes an emitter device for emitting an optical measuring beam to the target object, a capturing device including a detection surface for detecting an optical beam returned by the target object, and an evaluation device. The detection surface has a plurality of pixels, each pixel having at least one SPAD (single photon avalanche diode) and each of the plurality of pixels is connected to the evaluation device. The emitting device and the capturing device are configured in such a manner that the optical measurement beam returned by the target object simultaneously illuminates a plurality of pixels. The evaluation device is configured in order to determine the distance between the measuring device and the target object based on the evaluation of detection signals of several pixels.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: December 9, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Andreas Eisele, Oliver Wolst, Bernd Schmidtke
  • Patent number: 8902409
    Abstract: An optoelectronic sensor (10) for the detection and distance determination of objects in a monitored area (18) transmits a transmission light beam (14), generates a reception signal from remitted transmission light (20), and determines an object distance from a light time of flight. A reception path between light receiver (24) and evaluation unit (30) is divided into a first and a second partial reception path (46, 48, 50, 52) at a splitter element (44) comprising filtering properties to pass higher frequency parts of the reception signal on to the first partial reception path (46, 48) and lower frequency parts on to the second partial reception path (50, 52). An object's distance is determined from the first and an opacity from the second partial reception signal.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: December 2, 2014
    Assignee: Sick AG
    Inventors: Jorg Sigmund, Stefan Mack, Michael Kerp